---
title: "Windows Non-System Account Targeting Lsass"
excerpt: "LSASS Memory
, OS Credential Dumping
"
categories:
  - Endpoint
last_modified_at: 2022-01-12
toc: true
toc_label: ""
tags:
  - LSASS Memory
  - OS Credential Dumping
  - Credential Access
  - Credential Access
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
---



[Try in Splunk Security Cloud](https://www.splunk.com/en_us/products/cyber-security.html){: .btn .btn--success}

#### Description

The following analytic identifies non SYSTEM accounts requesting access to lsass.exe. This behavior may be related to credential dumping or applications requiring access to credentials. Triaging this event will require understanding the GrantedAccess from the SourceImage. In addition, whether the account is privileged or not. Review the process requesting permissions and review parallel processes.

- **Type**: [TTP](https://github.com/splunk/security_content/wiki/Detection-Analytic-Types)
- **Product**: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud

- **Last Updated**: 2022-01-12
- **Author**: Michael Haag, Splunk
- **ID**: b1ce9a72-73cf-11ec-981b-acde48001122


#### Annotations

<details>
  <summary>ATT&CK</summary>

<div markdown="1">


| ID             | Technique        |  Tactic             |
| -------------- | ---------------- |-------------------- |
| [T1003.001](https://attack.mitre.org/techniques/T1003/001/) | LSASS Memory | Credential Access |

| [T1003](https://attack.mitre.org/techniques/T1003/) | OS Credential Dumping | Credential Access |

</div>
</details>


<details>
  <summary>Kill Chain Phase</summary>

<div markdown="1">

* Actions on Objectives


</div>
</details>


<details>
  <summary>NIST</summary>

<div markdown="1">

* DE.AE
* DE.CM



</div>
</details>

<details>
  <summary>CIS20</summary>

<div markdown="1">



</div>
</details>

<details>
  <summary>CVE</summary>

<div markdown="1">


</div>
</details>

#### Search 

```
`sysmon` EventCode=10 TargetImage=*lsass.exe SourceUser!="NT AUTHORITY\\*" 
| stats count min(_time) as firstTime max(_time) as lastTime by Computer, TargetImage, GrantedAccess, SourceImage, SourceProcessId, SourceUser, TargetUser 
| rename Computer as dest 
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)` 
| `windows_non_system_account_targeting_lsass_filter`
```

#### Macros
The SPL above uses the following Macros:
* [security_content_ctime](https://github.com/splunk/security_content/blob/develop/macros/security_content_ctime.yml)
* [sysmon](https://github.com/splunk/security_content/blob/develop/macros/sysmon.yml)

> :information_source:
> **windows_non-system_account_targeting_lsass_filter** is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

#### Required field
* _time
* Computer
* TargetImage
* GrantedAccess
* SourceImage
* SourceProcessId
* SourceUser
* TargetUser


#### How To Implement
To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA. Enabling EventCode 10 TargetProcess lsass.exe is required.

#### Known False Positives
False positives will occur based on legitimate application requests, filter based on source image as needed.

#### Associated Analytic story
* [Credential Dumping](/stories/credential_dumping)




#### RBA

| Risk Score  | Impact      | Confidence   | Message      |
| ----------- | ----------- |--------------|--------------|
| 64.0 | 80 | 80 | A process, $SourceImage$, has loaded $ImageLoaded$ that are typically related to credential dumping on $dest$. Review for further details. |


> :information_source:
> The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author. 

#### Reference

* [https://en.wikipedia.org/wiki/Local_Security_Authority_Subsystem_Service](https://en.wikipedia.org/wiki/Local_Security_Authority_Subsystem_Service)
* [https://docs.microsoft.com/en-us/windows/win32/api/minidumpapiset/nf-minidumpapiset-minidumpwritedump](https://docs.microsoft.com/en-us/windows/win32/api/minidumpapiset/nf-minidumpapiset-minidumpwritedump)
* [https://cyberwardog.blogspot.com/2017/03/chronicles-of-threat-hunter-hunting-for_22.html](https://cyberwardog.blogspot.com/2017/03/chronicles-of-threat-hunter-hunting-for_22.html)
* [https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/master/Exfiltration/Invoke-Mimikatz.ps1](https://raw.githubusercontent.com/PowerShellMafia/PowerSploit/master/Exfiltration/Invoke-Mimikatz.ps1)
* [https://docs.microsoft.com/en-us/windows/win32/procthread/process-security-and-access-rights?redirectedfrom=MSDN](https://docs.microsoft.com/en-us/windows/win32/procthread/process-security-and-access-rights?redirectedfrom=MSDN)



#### Test Dataset
Replay any dataset to Splunk Enterprise by using our [replay.py](https://github.com/splunk/attack_data#using-replaypy) tool or the [UI](https://github.com/splunk/attack_data#using-ui).
Alternatively you can replay a dataset into a [Splunk Attack Range](https://github.com/splunk/attack_range#replay-dumps-into-attack-range-splunk-server)


* [https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1003.001/atomic_red_team/windows-sysmon_creddump.log](https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1003.001/atomic_red_team/windows-sysmon_creddump.log)



[*source*](https://github.com/splunk/security_content/tree/develop/detections/endpoint/windows_non_system_account_targeting_lsass.yml) \| *version*: **1**